air condition INFINITI QX56 2011 Factory Service Manual

HAC-150
< REMOVAL AND INSTALLATION >[AUTOMATIC AIR CONDITIONING]
INTAKE SENSOR
INTAKE SENSOR
Exploded ViewINFOID:0000000006276004
Refer to
HA-41, "Exploded View".
Removal and InstallationINFOID:0000000006276005
REMOVAL
1. Remove the front evaporator assembly. Refer to HA-43, "EVAPORATOR : Removal and Installation".
2. Remove the intake sensor from front evaporator.
INSTALLATION
Note the following items, and install in the reverse order of removal.
CAUTION:
 Replace O-rings with new ones. Then apply the compressor oil to them when installing.
 Mark the mounting position of intake sensor bracket prior to removal so that the reinstalled sensor
can be located in the same position.
 Never rotate the bracket insertion part when removing and installing the intake sensor.
 Check for leakages when recharging refrigerant. Refer to HA-18, "
Leak Test".
Revision: 2010 May2011 QX56

EXHAUST GAS/OUTSIDE ODOR SENSORHAC-151
< REMOVAL AND INSTALLATION > [AUTOMATIC AIR CONDITIONING]
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EXHAUST GAS/OUTS IDE ODOR SENSOR
Removal and InstallationINFOID:0000000006276007
REMOVAL
1. Remove bumper molding. Refer to EXT-13, "Removal and Installation".
2. Remove bolt, and then remove exhaust gas/outside odor sensor.
INSTALLATION
Install in the reverse order of removal.
Revision: 2010 May2011 QX56

HAC-152
< REMOVAL AND INSTALLATION >[AUTOMATIC AIR CONDITIONING]
DOOR MOTOR
DOOR MOTOR
Exploded ViewINFOID:0000000006276008
Front A/C unit
Rear A/C unit
JMIIA0645ZZ
1. A/C unit assembly 2. Upper ventilator door lever 3. Upper ventilator door link
4. Upper ventilator door motor 5. Air mix door motor LH 6. Air mix door adaptor B
7. Air mix door adaptor A 8. Intake door motor 9. Intake door motor lever
10. Intake door lever 11. Blower unit assembly 12. Foot door lever
13. Foot door link 14. Air mix door motor RH 15. Air mix door adaptor
16. Mode door motor 17. Mode door motor lever 18. Mode door motor bracket
19. Main link 20. Ventilator door link 21 Ventilator door lever
22. Defroster lever
JMIIA0646ZZ
Revision: 2010 May2011 QX56

DOOR MOTORHAC-153
< REMOVAL AND INSTALLATION > [AUTOMATIC AIR CONDITIONING]
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MODE DOOR MOTOR
MODE DOOR MOTOR : Re moval and InstallationINFOID:0000000006276009
REMOVAL
1. Remove instrument lower panel RH. Refer to IP-14, "Removal and Installation".
2. Remove power steering control unit bracket.
3. Remove fixing screws (A), and then remove mode door motor (1).
4. Disconnect mode door motor connector.
INSTALLATION
Install in the reverse order of removal.
AIR MIX DOOR MOTOR
AIR MIX DOOR MOTOR : Re moval and InstallationINFOID:0000000006276010
REMOVAL
Driver side
1. Remove automatic drive position control unit. Refer to ADP-136, "Removal and Installation".
2. Remove fixing screws (A), and then remove air door motor LH (1).
3. Disconnect air mix door motor connector.
Passenger side
1. Remove heater core. Refer to HA-44, "HEATER CORE : Removal and Installation".
2. Remove fixing screws, and then remove air mix door motor RH.
INSTALLATION
Install in the reverse order of removal.
INTAKE DOOR MOTOR
INTAKE DOOR MOTOR : Re moval and InstallationINFOID:0000000006276011
REMOVAL
1. Remove blower unit assembly. Refer to VTL-15, "Removal and Installation".
2. Remove fixing screws, and then remove intake door motor.
1. Rear A/C unit assembly 2. Rear mode door lever 2 3. Rear mode door lever 1
4. Rear mode door motor 5. Rear air mix door motor
JMIIA0790ZZ
JMIIA0788ZZ
Revision: 2010 May2011 QX56

HAC-154
< REMOVAL AND INSTALLATION >[AUTOMATIC AIR CONDITIONING]
DOOR MOTOR
3. Disconnect intake door motor connector.
INSTALLATION
Install in the reverse order of removal.
UPPER VENTILATOR DOOR MOTOR
UPPER VENTILATOR DOOR MOTO
R : Removal and InstallationINFOID:0000000006276012
REMOVAL
1. Remove automatic drive position control unit. Refer to ADP-136, "Removal and Installation".
2. Remove fixing screws (A), and then remove intake door motor (1).
3. Disconnect intake door motor connector.
INSTALLATION
Install in the reverse order of removal.
REAR MODE DOOR MOTOR
REAR MODE DOOR MOTOR : Removal and InstallationINFOID:0000000006276013
REMOVAL
1. Remove luggage side lower finisher RH. Refer to INT-36, "LUGGAGE SIDE LOWER FINISHER :
Removal and Installation".
2. Remove fixing screws, and then remove rear mode door motor.
INSTALLATION
Install in the reverse order of removal.
REAR AIR MIX DOOR MOTOR
REAR AIR MIX DOOR MOTOR : Removal and InstallationINFOID:0000000006276014
REMOVAL
1. Remove rear A/C unit assembly. Refer to HA-47, "REAR A/C UNIT ASSEMBLY : Removal and Installa-
tion".
2. Remove fixing screws, and then remove air mix door motor.
INSTALLATION
Install in the reverse order of removal.
JMIIA0789ZZ
Revision: 2010 May2011 QX56

IONIZER
HAC-155
< REMOVAL AND INSTALLATION > [AUTOMATIC AIR CONDITIONING]
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IONIZER
Exploded ViewINFOID:0000000006276015
Refer to HA-41, "Exploded View".
Removal and InstallationINFOID:0000000006276016
Removal
1. Remove instrument lower panel LH. Refer to IP-14, "Removal and Installation".
2. Remove mounting screws, and then remove ionizer from A/C unit assembly. CAUTION:
Never tough the surface (ceramic part) of th e ionizer. It is the discharge electrode.
3. Disconnect ionizer harness connector.
INSTALLATION
Note the following item, install in the reverse order of removal.
CAUTION:
If there is dirt, use a clean clot h and clean the discharge electrode (ceramic part) of the ionizer.
Revision: 2010 May2011 QX56

INL-12
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)INFOID:0000000006368143
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.
×: Applicable item
*: This item is indicated, but not used.
FREEZE FRAME DATA (FFD)
The BCM records the following vehicle condition at the time a particular DTC is detected, and displays on
CONSULT-III.
Diagnosis mode Function Description
Work Support Changes the setting for each system function.
Self Diagnostic Result Displays the diagnosis results judged by BCM. Refer to BCS-57, "
DTCIndex".
CAN Diag Support Monitor Monitors the reception status of CAN communication viewed from BCM. Refer to CONSULT-III opera-
tion manual.
Data Monitor The BCM input/output signals are displayed.
Active Test The signals used to activate ea ch device are forcibly supplied from BCM.
Ecu Identification The BCM part number is displayed.
Configuration  Read and save the vehicle specification.
 Write the vehicle specification when replacing BCM.
System Sub system selection item Diagnosis mode
Work Support Data Monitor Active Test
Door lock DOOR LOCK ×××
Rear window defogger REAR DEFOGGER ××
Warning chime BUZZER ××
Interior room lamp timer INT LAMP ×××
Exterior lamp HEAD LAMP ×××
Wiper and washer WIPER ×××
Turn signal and hazard warning lamps FLASHER ×××
— AIR CONDITONER* ××
 Intelligent Key system
 Engine start system INTELLIGENT KEY
×××
Combination switch COMB SW ×
Body control system BCM ×
IVIS IMMU ×××
Interior room lamp battery saver BATTERY SAVER ×××
Back door TRUNK ×
Vehicle security system THEFT ALM ×××
RAP system RETAINED PWR ×
Signal buffer system SIGNAL BUFFER ××
Revision: 2010 May2011 QX56

INL-60
< DTC/CIRCUIT DIAGNOSIS >
LUGGAGE ROOM LAMP CIRCUIT
LUGGAGE ROOM LAMP CIRCUIT
DescriptionINFOID:0000000006216071
Controls the luggage room lamp and automatic back door close switch illumination (ground side) to turn the
luggage room lamp and automatic back door close switch illumination ON and OFF.
Diagnosis ProcedureINFOID:0000000006216072
CAUTION:
Before performing the diagnosis, check that the following are normal.
 Interior room lamp power supply
 Luggage room lamp bulb
1.CHECK LUGGAGE ROOM LAMP OUTPUT
1. Turn ignition switch OFF.
2. Remove the luggage room bulb.
3. Disconnect automatic back door close switch connector.
4. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
Fixed ON>>GO TO 3.
Fixed OFF>>Replace BCM. Refer to BCS-81, "
Removal and Installation".
2.CHECK LUGGAGE ROOM LAMP OPEN CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness c onnector and luggage room lamp harness connector.
3. Check continuity between BCM harness connector and automatic back door close switch harness con-
nector.
Is the inspection result normal?
YES >> Replace luggage room lamp or automatic back door close switch.
NO >> Repair or replace harnesses.
3.CHECK LUGGAGE ROOM LAMP SHORT CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
BCM
Ground Condition Continuity
Connector Terminal
M69 49 Back door Open Existed
Closed Not existed
BCM Luggage room lamp Continuity
Connector Terminal Connector Terminal
M69 49 B11 1 Existed
BCM Automatic back door close switch Continuity
Connector Terminal Connector Terminal
M69 49 D158 4 Existed
BCM GroundContinuity
Connector Terminal
M69 49 Not existed
Revision: 2010 May2011 QX56

INL-64
< DTC/CIRCUIT DIAGNOSIS >
PUDDLE LAMP CIRCUIT
PUDDLE LAMP CIRCUIT
DescriptionINFOID:0000000006216076
Controls the puddle lamp (ground side) to turn the puddle lamp ON and OFF.
Diagnosis ProcedureINFOID:0000000006216077
CAUTION:
Before performing the diagnosis, check that the following is normal.
 Interior room lamp power supply
1.CHECK PUDDLE LAMP OUTPUT
1. Turn ignition switch OFF.
2. Disconnect puddle lamp connector.
3. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
Fixed ON>>GO TO 3.
Fixed OFF>>Replace BCM. Refer to BCS-81, "
Removal and Installation".
2.CHECK PUDDLE LAMP OPEN CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector and puddle lamp harness connector.
Is the inspection result normal?
YES >> Replace puddle lamp.
NO >> Repair or replace harnesses.
3.CHECK PUDDLE LAMP SHORT CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> Repair or replace harnesses.
BCM
Ground Condition Continuity
Connector Terminal
M71 72 Any door
(except back door)Open Existed
Closed Not existed
BCM Puddle lamp Continuity
Connector Terminal Connector Terminal
M71 72 Driver side D3
14 Existed
Passenger side D23
BCM
GroundContinuity
Connector Terminal
M71 72 Not existed
Revision: 2010 May2011 QX56

PUSH-BUTTON IGNITION SWITCH ILLUMINATION CIRCUIT
INL-65
< DTC/CIRCUIT DIAGNOSIS >
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PUSH-BUTTON IGNITION SWIT CH ILLUMINATION CIRCUIT
Component Function CheckINFOID:0000000006265016
1.CHECK PUSH-BUTTON IGNITION SWITCH ILLUMINATION OPERATION
CONSULT-III ACTIVE TEST
1. Turn the ignition switch ON.
2. Select “ENGINE SW ILLUMI” of BCM (I NTELLIGENT KEY) active test item.
3. With operating the test items, check that the pus h-button ignition switch illumination turns ON/OFF.
Does the push-button ignition switch illumination turn ON/OFF?
YES >> Push-button ignition switch illumination circuit is normal.
NO >> Refer to INL-65, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006265017
1.CHECK PUSH-BUTTON IGNITION SWITCH ILLUMINATION POWER SUPPLY OUTPUT
1. Turn ignition switch OFF.
2. Lighting switch OFF.
3. Disconnect push-button ignition switch connector.
4. Check voltage between push-button ignition switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 2.
2.CHECK PUSH-BUTTON IGNITION SWITCH ILLU MINATION POWER SUPPLY OPEN CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between BCM harness connector and the push-button ignition switch harness connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harnesses.
3.CHECK PUSH-BUTTON IGNITION SWITCH ILLU MINATION POWER SUPPLY SHORT CIRCUIT
Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
On : Push-button ignition
switch illumination ON
Off : Push-button ignition switch illumination OFF
(+)
(–) Condition Vo l ta g e
(Approx.)
Push-button ignition switch
Connector Terminal
M101 3 Ground Push-button ignition
switch illuminationON Condition 12 V
OFF Condition 0 V
BCM Push-button ignition switch Continuity
Connector Terminal Connector Terminal
M71 90 M101 3 Existed
BCM GroundContinuity
Connector Terminal
M71 90 Not existed
Revision: 2010 May2011 QX56